Sanyo MPC-2
This page was last modified 02:40, 18 January 2021 by Mars2000you. Based on work by Rderooy and Gdx and others.

Contents

Description

Standard version

The Sanyo MPC-2, a.k.a Wavy2, was a "low cost" MSX aimed at the Japanese market. It was available in a black (K) or white (W) variation. The power supply is internal. It was first shown to the public at the Japan Electronics Show '85 (Oct 17-22).

This machine has been localised for the Arabic, Italian and Spanish markets - see Sakhr AX-170 and AX-230, Fenner FPC-500, Sanyo MPC-200.

Special versions

This is a rare version, released to celebrate the production of the 100,000 MSX as the sticker on the mainboard suggests. This special version has 3 cartridge slots, but is without printer connector.

You need to insert the cartridges before switching on the computer. These cartridges are detected when you switch it on and the computer uses them simultaneously, what can be very interesting for some games (example: Game Master 2 + Gradius/Nemesis + Twin Bee).

A button allows to restart the MSX with a different slot configuration, by following this automatic loop: only cartridge in slot 1 - only cartridge in slot 2 - only cartridge in slot 3 - back to multi-cartridge using - only cartridge in slot 1 - etc...

In addition, according Japanese MSX-Magazine 1987-04, page 104-105, another special version has been produced for education in 1987. This version has a specific LAN connector instead of TV out and has been upgraded to the MSX2 standard. This LAN interface allows to network up to 63 units on one host at 18,600 bps. That version has two cartridge slots.

These special versions are very rare nowaday!

Brand Sanyo
Type MPC-2
Year 1985
Region Japan
Original price ¥39,800
RAM 64kB (standard version: in slot 3 - special version: in slot 0-1)
VRAM 16kB
Media MSX cartridges
Video Toshiba T6950
Audio PSG (AY-3-8910 or T7766A)
Chipset Toshiba T7775
Keyboard layout QWERTY/JP50on
Extras (standard version) Reset button, (special version) cartridge selector button with automatic reset
Emulation ROM dumped and emulated for the standard version. For the special versions ROM dumps are needed. See this thread for details

Pictures

Standard version

Sanyo MPC-2 (K)
Sanyo MPC-2 underside
Sanyo MPC-2 (W)
Sanyo MPC-2 left side
Sanyo MPC-2 back
Sanyo MPC-2 right side
Sanyo MPC-2 box and content
Sanyo MPC-2 computer, cables and manuals
Sanyo MPC-2 manuals
Sanyo MPC-2 PCB with AY-3-8910 PSG
Sanyo MPC-2 PCB with T7766A PSG
Sanyo MPC-2 label
Sanyo MPC-2 PCB underside (rightmost part is missing)
Sanyo MPC-2 PCB underside (leftmost part is missing)
Sanyo MPC-2 Toshiba MSX-Engine T7775

Special version

Sanyo MPC-2 with 3 slots
Sanyo MPC-2 with 3 slots PCB
Sanyo MPC-2 with 3 slots
PCB detail

Specifications

The MPC-2 is a MSX1 with a MSX-Engine T7775. The used VDP is the Toshiba T6950, which does not support some undocumented features of the Texas Instruments TMS9918, TMS9928 and TMS9929 VDP's.

The main RAM of the special version is present on slot 0-1, a configuration that can cause poorly written software to crash. Also, with this layout, the POKE-1,(15-PEEK(-1)\16)*17 trick to workaround buggy software that does not handle subslots properly will cause this machine to freeze. So try BMMS instead if you have a memory expansion with Memory Mapper even if his tool doesn't work for MSX-DOS with several floppy disk drives when the internal Ram is in a slot 0 extended.

Slot Map for standard version

Slot 0 Slot 1 Slot 2 Slot 3
Page C000h~FFFFh Cartridge
Slot 1
Cartridge
Slot 2
64kB RAM
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM
Page 0000h~3FFFh

Slot Map for special version

Slot 0-0 Slot 0-1 Slot 0-2 Slot 0-3 Slot 1 Slot 2 Slot 3
Page C000h~FFFFh 64kB
RAM
Cartridge
Slot 1
Cartridge
Slot 2
Cartridge
Slot 3
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM
Page 0000h~3FFFh

Connections